Room Dimensions: use inches instead of feet and inches
Listener Position: Standing =64.4 inches (164mm); Sitting = 48.5 inches (124mm)
Speaker F Values
Speaker | Good | Better | Best |
PRI665CV | 3.128 | 2.606 | 2.086 |
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PRI685CV | 2.619 | 2.183 | 1.746 |
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Note: Good coverage = ± 6dB; Better coverage = ± 3dB and Best coverage = ± 1.5 dB. Typically we recom- mend Better coverage but if cost constraints make this impossible for the customer, then use the Good cover- age. Best coverage is where you want very even coverage and typically either low or high SPL.
= Ceiling Height – Listener Position Spacing max = Hdiff x Speaker F value
Columns = Roundup ( room length / Spacing max )
Rows = Roundup ( room width / Spacing max )
Spacing L = room length / columns
Spacing W = room width / rows
First speaker is placed at (Spacing L/2, Spacing W/2)
Next column is placed at (Spacing L/2+ Spacing L) … and so on until all columns are placed Next Row is placed at (Spacing W/2+ Spacing W) … and so on until all columns are placed
To determine how many subwoofer you require for a room, the calculations are much easier. You determine the cubic feet of the room (L x W x H all in feet), divide this number by 15,000 and round up.
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To determine the max SPL in the room, you need to know Hdiff in feet and the Max SPL of the speaker. Use the following Max SPL at 3 feet for each speaker is:
Speaker Type | Max SPL |
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PRi665CV | 101 dB |
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PRi685CV | 103 dB |
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PRi85SubCV | 101 dB |
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Note: These are not the absolute max SPL for the speaker. These are guidelines to use for designing systems.
